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Tomato entries for the Mike Demars Tomato Contest
In Grower Diaries
Tomato entries for the Mike Demars Tomato Contest
In Grower Diaries
Watermelon Scale Project
In Grower Diaries
Bob MacKenzie
Jul 19, 2023
For the last few weeks I have been working on the next steps to complete the watermelon scales. First, I made a frame out of 2” angle iron. Added a hardwood top to the frame. The frame was made exactly the same size as our hammocks.   Routed a recess for each load cell and painted everything black.    Sealed the load cells in place using silicone. Connected all the wiring to the control box and put all the wire into split loom. To protect the load cells from moisture I put a small piece of plastic over each one and then covered that plastic with aluminum tape. I want to keep rain water out as much as possible. Once I had everything wired up I had to connect my computer to the Arduino board and upload the program. I then tared off the weight of each hammock and saved that weight in the memory of the board. I also had to tweak the software a bit to calibrate the scale slightly to get a more accurate weight. So each time the scale is powered up it will subtract the weight of the hammock and only display the melon weight. Here I have one of the frames sitting in the grass just before I was ready to put it under the melon.                 I had to test it out one more time before using it so I put the hammock on top and weighed myself. It was very close to my weight so I am confident that the scale is fairly accurate. Here is the first melon on the scale. I’m not happy with the shape of the melons this year. I can’t get a decent shaped melon for some reason. I have removed a lot of pear shaped and crooked ones and I had to make a decision to keep one because we are getting late in the season. I have had this melon on the scale for 2 days now and found out that this one loses 2 lbs. during the day for some reason and gains 5-6 lbs. during the night. Not sure if this will continue but that is what has happened in the last 2 days. It weighs 31 lbs. this morning. Here is our other melon sitting on the scale. This one is not growing as fast so far and I don’t like the shape of it as well. This one loses very little weight during the day. It puts on a little weight at night but so far only a couple of lbs. So each melon seems to have its own growing cycle. It will be interesting to track this as the season progresses. My next project is to make a stand to set the control box on. I also want to build a cover that will go over the stand to shed rain. I made the control box as watertight as I could but I would feel better if it  had an additional cover over it.
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2022 GVGO Mike Demars Tomato Contest Final Standings
In Grower Discussion
2022 MacKenzie Diary
In Grower Diaries
2022 MacKenzie Diary
In Grower Diaries
2022 MacKenzie Diary
In Grower Diaries
2022 MacKenzie Diary
In Grower Diaries
Bob MacKenzie
Aug 15, 2022
I have been planning to build a new pumpkin lifting ring for a while now and have finally started the project this month. Last winter I purchased a machine called a Chinese Shoe Patcher so that I would be able to make my own straps for the lifter. This is basically a manual sewing machine that people use to sew leather and other heavy fabrics. These are very economical machines that can be purchased on Amazon. The only problem is they don’t work right out of the box. You have to disassemble the machine and cleanup/polish the castings with fine sandpaper. After that, apply some lubrication, adjust tension and timing and the machine works very well. They are operated by cranking the wheel on the right. I joined an online group that has a site that is dedicated to the setup and use of these machines. The thread we are using is a heavy duty polyester outdoor thread that is typically used for sails, boat covers, tents etc. The first thing that I wanted to do was to prove that the machine would be capable of stitching a loop on a strap that would be strong enough. I plan to make the straps out of seatbelt material so I made up a test strap so that I could put it through a pull test. . A loop was stitched on each end. After looking around the farm for something heavy I decided to attach the test strap to a large Walnut log and test the stitching. We have an electronic load cell scale and I attached it to the bottom of the test strap. I kept applying upward pressure to the strap and to my surprise the log started to rise off the ground. I checked the digital readout and it was measuring over 1100 lbs. That will be more than enough, especially since we will be using 8 straps on the ring. The test strap showed no signs of any damage so I think the stitching passed the strength test. Now I have to build the ring. I purchased some hot rolled flat bar and started the project. I could have use the acetylene torch to heat the bar but for a job like this I usually go to my grandfather’s old coal forge. I have many memories of my grandfather using this forge when I was a young lad. He would let me turn the crank on the blower to put air to the fire. I would watch in amazement as he would turn the red hot piece of iron into something useful. It’s funny how the distinctive odors and sounds from the forge bring back so many memories from the past. Here I am trying to get things to line up. Here is the ring just before I added the straps. I put the loops on the straps ahead of time to make the stitching easier. I then added the straps to the ring before welding everything solid. It would have been very difficult to stitch the straps while on the ring. I have seen that some lifting rings have their straps attached with buckles and sometimes tied in place, but I wanted them permanently stitched in place. Here is a look at it after a coat of zesty orange paint.
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Bob MacKenzie

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